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幸福來自內心。

When we protect biodiversity, we're protecting humanity's safety net.

The art of teaching consists in large part of the ability to awaken the natural curiosity of young minds and to satisfy it with the nourishment of knowledge.

處理一個不自由的世界唯一的方法是變得如此絕對自由，以至于你的存在本身就是一種反叛。